I use a customized version of my D-TAR (Duncan-Turner Acoustic Research) "Timberline" with internal preamp and external 18 volt battery box. I'd put it up against anything, any time, any day including a Sure SM-57 mic, but I have to charge about $350.00 for it installed.
But I am one of the few luthiers who is just about equally at home on the amplified side of things as the acoustic side. I've been making pickups since 1969, and it's just part of my normal bag of tricks. Most acoustic luthiers abhor having to deal with amplification, but in the real world of professional acoustic musicians, pickups are an absolute necessity. I personally believe that pickups have saved acoustic stringed instruments from the dust bin of history. That is a very unpopular attitude among acoustic luthiers...